Soon after taking a psychoactive drug,Larisa's breathing slowed,her pupils constricted,and her feelings of anxiety were replaced by feelings of extreme relaxation.Larisa most likely experienced the effects of

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Heroin is an opioid that causes respiratory depression, constriction of the pupils, and a feeling of extreme relaxation. Cocaine, LSD, and nicotine do not typically produce these specific effects.

Soon After Taking a Psychoactive Drug,Larisa's Breathing Slowed,her Pupils Constricted,and